月曜だからデザインパターンでも勉強しよう vol.1 それは何 & singleton
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vol.1 & Singleton
Wikipedia
Wikipedia
Wikipedia
ex.
ex.
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ex.
GoF23
Singleton
class Singleton{ private static $instance;
private __construct() { }
public getInstance() { if (self::$instance) { return self::$instance; }
self::$instance = new self; return self::$instance; }}
DB
DB
DBMultiton
private static $instance = [];